Our Black and Rust Male was born on October 11th, 2011. I was just wondering if anyone else has had a 4 month old that was 54lbs?! He's not overweight, just growing incredibly fast. He's growing at a 13.5lb/month rate, which is higher than all the forums that i've read. Has anyone had a puppy this large? if so, how big did your dobie get? we're trying to figure out how big he's going to end up.